I second Jim. If you want to learn Chinese or Japanese, start now. Apart from the fact that it is a different language, learning the kanji is a major undertaking. I am learning Japanese. The effort is measured in years of dedication. And get a coach to help you with the tonal angle because otherwise you will get lost. It is my first non-roman language so I am struggling with it.

Learning a second language is something that everyone should do. It gives you a much better understanding of the rest of the world, as well as help you talk to other people. this is easy to say for me of course. In Belgium you generally learn 3 languages before you graduate high school, not including optional languages like Latin and German.

After Japanese (hah. in 10 years or so ) I'd like to add Spanish, Arabic or Hebrew. Or somethign else. Learning languages is fun and really broadens your world.
Go for it. You will never regret it. Even if you drop out after the basics, you'll have something you can use for life. And if you ever have to interact with someone who speaks that language, just saying 'good morning' in their native language is a huge goodwill gesture.